B- 19. “Operational Energy exported and on-site produced and allocation of environmental impacts”

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*Aspect*		B- 19. “Operational Energy exported and on-site produced and allocation of environmental impacts”In future, buildings will not only be energy- efficient, but also will produce energy on site in multiple ways.
*Description*		The energy produced at the building site may not only be consumed in the building, but also exported to the grid. For such cases, calculation and allocation rules need to be defined.
*related study objective*		☒ stand-alone LCA		☒ comparative assertion
*related study phase*		☒	☐	☐	☐	☐
		goal and scope definition	inventory analysis (LCI)	impact assessment (LCIA)	interpretation	reporting
*relevant for*
	new buildings	existing buildings	construction products	screening LCA	simplified LCA	complete LCA
*Provisions*	Impacts have to be calculated with regards to EN 15978, in Annex B case studies of different energy related questions are provided.
*Rules from:*	*EN 15978:8.6.5 Scenarios for operational energy use – Module B6Annex B (informative) Exported energy – Case studiesCase 1 (Scenario for energy use, supply and import) Case 2 (Scenario for energy use and export) Case 3 (scenario for energy use, supply and export) Case 4 (scenario for energy export) EN 15804:* Not mentioned *ILCD*: Not mentioned
*Guidance*	The case studies in Annex B of EN 15978 are helpful to identify the situation that applies to a concrete case study. From these case studies, the treatment of the situation may be extracted.